Assume that in a certain species of tree, dark green leaves are dominant to ligh
ID: 19669 • Letter: A
Question
Assume that in a certain species of tree, dark green leaves are dominant to light green leaves and white blossoms are dominant to pink blossoms. Assuming the two genes are not linked, what are the predicted phenotypes and their frequencies in a cross between a light green leafed tree with pink blossoms and a tree heterozygous for each of these characters?A.9 dark leafed, white blossomed : 3 dark leafed, pink blossomed : 3 light leafed, white blossomed : 1 light leafed, pink blossomed
B.3 dark leafed, white blossomed : 1 light leafed, pink blossomed
C.1 dark leafed, pink blossomed : 1 dark leafed, white blossomed : 1 light leafed pink blossomed : 1 light leafed white blossomed
D.9 light leafed, pink blossomed : 3 dark leafed, pink blossomed : 3 light leafed, white blossomed : 1 dark leafed, white blossomed
E.1 light leafed, pink blossomed : 1 dark leafed, white blossomed
Explanation / Answer
The answer is A because: Dark green =G light green =g white = W pink =w light green with pink blossoms =gw heterozygous meaning different so GW. The P1 generation would result in Gw and gW The F1 generation would result in all the genotypes and phenotypes being the same The F2 generation would result in 9 WWGG, 3 GGww or Ggww, 3 ggWW or ggWw, and 1 ggww